Electric fireplace



FIG. 1 is a front perspective view of the electric fireplace showing the design; and,

FIG. 2 is a front view thereof.

The bottom, side, rear, or top views are not shown, as they form no part of the claimed design. The broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for an electric fireplace, as shown and described. 